66450142444007 has 16 divisors (see below), whose sum is σ = 80421899247360. Its totient is φ = 53599075705728.

The previous prime is 66450142443967. The next prime is 66450142444013. The reversal of 66450142444007 is 70044424105466.

It is not a de Polignac number, because 66450142444007 - 2²⁴ = 66450125666791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66450142444027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39601157 + ... + 41245022.

It is an arithmetic number, because the mean of its divisors is an integer number (5026368702960).

Almost surely, 2^{66450142444007} is an apocalyptic number.

66450142444007 is a deficient number, since it is larger than the sum of its proper divisors (13971756803353).

66450142444007 is a wasteful number, since it uses less digits than its factorization.

66450142444007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80853110.

The product of its (nonzero) digits is 2580480, while the sum is 47.

The spelling of 66450142444007 in words is "sixty-six trillion, four hundred fifty billion, one hundred forty-two million, four hundred forty-four thousand, seven".